Quick Summary
Click here for Price and Turnaround Time
Phenotype: Affected dogs typically present with multiple, discrete circular areas of retinal detachment between 11 and 16 weeks of age. Fluid accumulates under the detached retina resulting in gray, tan, orange or pink “blisters” in the eye. Progression of retinal changes is slow, ceases by 1 year, and does not lead to blindness.
Mode of Inheritance: Autosomal recessive
Alleles: N = Normal, CMR1 = Canine multifocal retinopathy 1
Breeds appropriate for testing: American Bulldog, American Bully, Aussiedoodle, Australian Koolie, Australian Shepherd, Brazilian Terrier, Bulldog, Bullmastiff, Cane Corso, Dogue de Bordeaux, English Bulldog, English Mastiff, French Bulldog, Great Pyrenees, Havanese, Koolie, Mastiff, Miniature American Shepherd, Miniature Australian Shepherd, Olde English Bulldogge, Perro de Presa Canario, Shorty Bull, South African Boerboel, Toy Australian Shepherd
Explanation of Results:
- Dogs with N/N genotype will not have canine multifocal retinopathy 1 and cannot transmit this CMR1 variant to their offspring.
- Dogs with N/CMR1 genotype will not have canine multifocal retinopathy 1, but are carriers. They will transmit this CMR1 variant to 50% of their offspring. Matings between two carriers are predicted to produce 25% canine multifocal retinopathy 1-affected puppies.
- Dogs with CMR1/CMR1 genotype will develop canine multifocal retinopathy 1, an eye disease, and will transmit this variant to all of their offspring.
Results of this test can be submitted to the OFA (Orthopedic Foundation for Animals)
Brazilian Terrier Health Panel
$105 per animal
Bulldog Health Panel
$105 per animal
French Bulldog Health Panel 1
$130 per animal
French Bulldog Health Panel 2
$130 per animal
Havanese Health Panel
$105 per animal
Canine multifocal retinopathy 1 (CMR1) is an inherited eye disease caused by a mutation (c.73C>T) in the Bestrophin 1 gene that results in a shortened, dysfunctional protein. Affected dogs typically present with multiple, discrete circular areas of retinal detachment between 11 and 16 weeks of age. Fluid accumulates under the detached retina resulting in gray, tan, orange or pink “blisters” in the eye. Progression of retinal changes is slow, ceases by 1 year, and does not lead to blindness. In some cases, the blisters appear to heal as the dog ages but vision loss has been reported.
The disease is inherited in an autosomal recessive fashion thus two copies of the CMR1 mutation must be present to produce the disease. Breeding two carriers is predicted to produce 25% affected pups.
The VGL offers genetic tests for CMR1, CMR2, and CMR3 mutations. Genetic screening helps breeders establish the genetic status of breeding stock and select mating pairs appropriately in order to reduce the risk of producing affected offspring.